Welcome, and congratulations Shauna! While not that far away, I do have my DD with 2 Gsons a flight away. We maintain a relationship via facetime, and it definitely has worked. When we do see them, there is no hesitation to run into our arms!
My daughter was patient with me, holding her phone while I goo-goo'd the baby talk, sang Itsy Bitsy Spider, etc. How wonderful to get giggles from a young baby over video! It is a whole new world indeed.
We send little packages, even though a box of Smarties and a small book is more expensive to mail, than just send money. They love to get little packages from us.
A friend of mine whose little ones are further away also read stories (buy two versions of the same book, one for you and one for them), and had puppets that would entertain as well.
And always have something in your suitcase for them when you arrive! Mine now know it, and will help me unzip my case and have a look for their little treat!
Good luck, and enjoy the blessings of being a grandparent.